Lamp-support



C. SCHOENFELD..

LAMP SUPPORT.

APPLICATION FILED DECA s, ma.

192i). SHEET l.

I `Patented Dee. '7

CHARLES 'SCHOENFELD, CANTON, OHIO.

LAMP-SUPPORT.

Specification of Letters Patent.

Patented Deo. 7, 1920.

Application filed December 3, 1918. Serial No. 265,099.

To all whom t may concern.'

Be it known that I, CHARLES ScHoENrELD, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful Lamp- Support, of which the following is a specification.

This invention relates to lamp supports and more especially to a support for a lamp to be used upon work-benches, drafting tables and the like.

The object of this invention is to construct a lamp support that can be secured to the top of a work-bench or ltable or that by reversing the standard, may be suspended from the ceiling above the said bench or table.l

Another obj ect is to provide an arm upon which the light may be moved backw-ardly and forwardly toward and away lfrom the standard so that a lamp may be brought into any desired position over the workbench or table.

A further object is to make the arm upon which the lamp is designed to slide, rotatable upon the standard so that it may be swung in the arc of a circle so as to give still greater range of adjustment of the light.

A still further object is to provide a vertically adjustable support rod upon the said swinging arm, so that any desirable elevation may be attained for a particular flighting upon the work. v

lVith these objects in view the invention consists in the novel construction and arrangement of parts, hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of construction may be made within the scope of the appended claims, without departing from the spirit or sacrilicing any of the advantages ofthe invention.

ln the drawings:

Figure 1 is a yside-elevation on a greatly reduced scale of my lamp support secured upon the top of a bench or table.

Fig. 2 is an enlarged detail elevation of the clamping nieans'for securing the swing.- ing arm in any desired position.

Fig. 8 is a sectional View taken Qn-the line Fig. 4 is an enlarged detail elevation kof the rolling carrier and bracket therefor, which slides upon the swinging arm.

Fig. 5 is a section on line 5-5 of Fig. 4.

Fig. 6 is a view similar to Fig. 1, but with the support secured to the ceiling. i

Fig. 7 is an enlarged detail of the spring for producing the clamping edect upon the vertically adjustable rod.

Fig. 8 is a side elevation of the parts shown in Fig. 7.

Fig. 9 is a face viewi of the adjustable lamp holder. v

Fig. 10 is a vertical sectional view of the adgustable lamp holder.

imilar numerals of reference indicate corresponding parts throughout the several lfigures of the drawings.

At 1 Iphave shown the main support of my device, which support is preferably formed of a piece of tubular metal and has a securing plate 2. fastened to one extremity. This plate 2 maybe attached by screws, bolts or the like to the top of a desk or table shown at 4 in F ig. 1 or may .be secured to the ceiling of the room in which the lamp is to be used, which ceiling is shown at 5 in Fig. 6. A reduced portion 7 formed upon a rotating member 8, is itted within the other extremity of the standard 1, the shoulder v9 formed by the said reduced portion fitting against the end of the said standard. An annular groove 10 is formed in the reduced `portion and a screw 11 -threaded through the tubular standard 1 engages the said groove to prevent the withdrawal of the rotatable member 8 from the standard. When vthe standard is secured to the ceiling as shown in'Fig. 6 the screw 10 and groove 11 will retain the rotatable member 8, in position. The ylower member 12 of a double clamping collar is secured by a screw 14 to the extremity of the standard 1 adjacent the rotatable member Sand the other member 15 of the said double clamping collar is designed to be made to bear upon the rotatable member 8 by a wing nut 16, to secure the rotatable member in any desired position with relation to the lstand-ard 1.

Fixed to the rotatable-member 8 is anarm 17 which projects .at right anglesV from the said rotatable member and form-s a ltrack for ia sliding-yoke 18. Rollers 19 are-,mounted inthe extremities ofthe yoke 18 andare designed to ride upon the-ugperedge of the arm Rivoted iin they e 18 at a point beneath the arms 17 is a brake arm 2O upon which is formed a face 21, which face is designed to be brought into frictional engagement with the under side of the arm 17, the said frictional engagement with the said face acting as a brake to hold the yoke against accidental relative movement upon the arm 17. To the end of the arm 20 opposite the end on which is formed the braking face 21. is secured a downwardly projecting bracket arm 22. The upper extremity of the bracket arm 22 is slightly off-set as clearly shown at 24 in Fig. 5 and opposite the off-set 24 is an off-set 25 formed upon the extremity of the arm 20, see also Fig. 5, and mounted between the off-sets 24 and 25 is an anti-friction roller 26 for a purpose to be hereinafter set forth. Secured to the lower end of the bracket arm 22 by a screw 27, is a box or housing formed of a plate 28 with outwardly turned flanges 29 and 80, which ianges form the upper and lower side of the said housing, and a lid 31 with flanges 32 and 34 which fianges form the ends of thesaid box or housing. Secured to the same side of the bracket arm 22 as the box or housing above referred to and slightly above the said housing is a plate 35 with a horizontally extending portion 36, in which horizontal portion is formed an aperture, through which is inserted a sliding rod 37, the said rod 37 passing through apertures in the flanges 29 and 30, which apertures are arranged in alinement with the aperture in the portion 86. All three of these apertures are designed to iit the rod 37 and while the said rod can be moved freely upwardly and downwardly through the said apertures no side play or lost motion is permitted between the rod and the apertures. Pivoted at 38 to the plate 28 of the housing is a friction pawl 39 which is designed to be pressed against one side of the sliding rod 37 by a leaf spring 40, which leaf spring is secured at one end to the friction pawl 39 and at its opposite end bears against a stud 41 secured in the plate 28. An adjusting screw 42 threaded through the iiange 30 is designed to adjust the pressure of the friction pawl against the side of the sliding rod. By this arrangement it will be seen that the friction pawl 39 by pressure exerted against the side of the rod 37 will cause the opposite side of the said rod to bind against the sides of the apertures through which it passes and thus hold the, said rod at any elevation to which it is moved.

Mounted for rotation upon the lower end of the sliding rod 37 is a collar 44, which collarv is held upon the said rod by a flat headed screw 45 threaded into the lower end of the'said rod. A dished, spring metal disk 46 is secured to one side of the collar 44 by a shoulder screw 47, the shoulder upon the said' screw bearing against the front face of the disk as clearly shown in Fig. 10. A flat disk 48 is carried bythe screw 47 and is `designed to bear upon the disk 46 by the tightening of the said screw, a sufficient friction being thus obtained between the two disks to hold the disk 48 at any position relative to the disk 46 to which the said disk 48 is moved. Secured to the front face of the disk 48 is a spring clamping collar 49 which collar is designed to receive an ordinary electric lamp socket 50, in which is carried the usual electric lamp 51, having a shade 52, as shown in Figs. 1 and 6. y It will be seen that the collar 44 may be rotated upon the rod 37, to bring the lamp socket in any desired position, and also that the disk 48 may be rotated upon the screw 47 to get any desired angle for the rays of light fallingfrom the lamp 51.

In the use of my device the wing nut 16 will be loosened and the arm 17 and rotatable member 8 swung to bring the light to the desired angle above the work. The wing nut 16 will then be tightened preventing accidental movement of the arm 17 after it has been put in position. The brake arm 20 will then be rocked upon itspivot by the operator of the light, until the antifriction roller 26 comes into contact with the lower edge of the arm 17. The brake face 21 will now be out of engagement with the lower face of the arm 17 and the rollers 19 operating upon the upper edge of the arm 17 will allow the yoke 18-to be moved freely backwardly and forwardly until the desired position of the light above the work, is reached. By releasing the bracket arm 22, the weight of said bracket arm, sliding rod and lamp will rock'the arm 20 upon its pivot once more and bring the braking surface into contact with the under side of the arm 17 and thus hold the yoke against accidental displacement after once being positioned. If it is desired to change the elevation of the light, by grasping the sliding rod 37 and exerting an upward or downward force upon theA said rod the friction exerted by the pawl 89 and spring 40 against therod can be overcome and the rod moved to bring the light to the desired elevation. The adjustment obtainable by the collar 44 and the disks 46 and 48 will enable the user` of the light to further adjust the lamp to bring the rays into the exact focus desired upon the work. A screw 54 is threaded through the outer extremity of the'arm 17 and is designed to prevent the yoke 18 from being accidentally withdrawn from the end of the arm 17. When it is desired to reverse the position of the standard 1 to the relatively opposite position of the positions shown in Figs. 1 and 6, the screw 54 can be removed and the yoke 18 withdrawn from the rod 17 and replaced after the standard has been Having now fully described my invention, what l desire to secure by Letters Patent, is-

1. ln a lamp support of the character described, a reversible standard, a rotatable member' carried by said standard, an arm carried by said rotatable member and rotatable therewith upon said standard, a yoke, rollers carried by said yoke and arranged to enga-ge the said arm and to roll thereon, a pivoted arm carried by said yoke, a vertically adjustable arm slidably mounted upon said bracket arm, and a lamp suspended from said vertically adjustable arm.

2. In a lamp support of the character described, a reversible standard, a rotatable member carried by said standard, an arm carried by said rotatable member and rotatable therewith upon said standard, a yoke slidably mounted upon said arm, rollers carried by said yoke and arranged to engage the arm and to roll thereon, a pivoted arm carried by said yoke, a vertically adjustable arm slidably mounted upon said pivoted arm and a friction pawl carried by said pivoted arm and designed to engage said vertically adjustable arm to prevent accidental displacement when said vertically adjustable arm has been adjusted to the desired elevation and a lamp carried by the vertically adj ustable arm and movable therewith.

3. In a lamp support of the character described, a reversible standard, a rotatable member carried by said standard, an arm carried by said rotatable member and rotatable therewith upon said standard, a yoke, rollers carried by said yoke and arranged to engage the said arm and to roll thereon, a pivoted arm carried by said yoke and a lamp suspended from said pivoted arm and vertically adjustable thereon.

l. ln a lamp support of the character described, a reversible standard, a rotatable member carried by said standard, an arm carried by said rotatable member and rotatable therewith upon said standard, a yoke, rollers carried by said yoke and arranged to engage the said arm and to roll thereon, a pivoted arm carried by said yoke, a braking face upon said pivoted arm designed to engage the rotatable arm, the said pivoted arm being designed to be swung upon its pivot to move the said braking face out of contact with the said rotatable arm to allow the said pivoted arm and yoke to be moved upon said rotatable arm.

5. In a lamp support of the character described, a standard, an arm carried by said standard, a yoke slidably mounted upon said arm, a bracket arm carried by said yoke, a vertically adjustable arm slidably mounted upon said bracket arm and a friction pawl carried by said bracket arm and designed to engage said vertically adjustable arm to prevent accidental displacement when said vertically adjustable arm has been adjusted to the desired elevation and a lamp carried by said vertically adjustable arm and movable therewith.

6. n a lamp support of the character described, a standard, an arm carried by said standard, a yoke slidably mounted upon said arm, vertically adjustable arm slidably mounted upon said bracket arm, means for holding the said vertical adjustable arm in any desired elevation, a collar rotatably mounted upon the lower extremity of saidvertically adjustable arm, a spring clamp rotatably mounted upon said collar and a lamp carried by said spring clamp and rotatable therewith.

7. In a lamp support of the character described, a reversible standard, a rotatable member mounted upon said standard, a clamping collar secured to said standard and designed to engage said rotatable member to secure it in any desired position of rotai tion relative to said standard, an arm carried by said rotatable member and rotatable therewith, a yoke slidably mounted upon said arm, a pivoted brake arm carried by said yoke and designed to engage said rotatable arm and prevent said yoke from sliding thereon when so engaged, a bracket arm carried by said pivoted brake arm, a friction pawl and friction surfaces carried by said bracket arm, a vertically adjustable rod mounted to engage said friction surfaces and said friction pawl and designed to be adjusted vertically relative to said'bracket arm when desired and to be held so adjusted by said friction surfaces and said friction pawl, a horizontally rotatable collar carried by said rotatable arm and a vertically rotatable disk carried by said collar, a lamp carried by said vertically rotatable disk and designed to be moved into any desired position by he individual movement of either said rotatable disk, rotatable collar, vertically adjustable rod, sliding yoke or revoluble arm or by the combined adjustment of all of them.

In testimony that I claim the above, I have hereunto subscribed my name.

CHARLES SCHOENFELD.

a bracket arm carried by said yoke, ar 

